Allen-Bradley 1756-IF8HK HART Analog Input Module
$123.00
$320.00
Description
Allen-Bradley 1756-IF8HK HART Analog Input Module
Configured for differential analog signal acquisition with integrated HART communication in ControlLogix backplane systems, the Allen-Bradley 1756-IF8HK, also cataloged as the 1756-IF8HK HART analog input module, provides direct electrical conversion of 8-channel differential voltage/current inputs with embedded HART digital signal extraction across isolated I/O paths.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1756-IF8HK |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.81 lbs |
| Power Consumption | 3.21–4.01 W max |
| Channels | 8 differential inputs |
| Signal Types | Current and voltage with HART overlay |
| Resolution | 16–21 bits |
| Backplane Current | 300 mA at 5.1 VDC, 70 mA at 24 VDC |
| Thermal Dissipation | 13.7 BTU/hour |
| Enclosure | Open input module |
| Protocol Support | HART |
EtherNet/IP Backplane HART Signal Decoupling Behavior
The module performs simultaneous acquisition of analog process signals and superimposed HART digital communication over shared current loop wiring. Within the ControlLogix backplane architecture, analog-to-digital conversion and HART demodulation are executed in parallel processing paths, separating low-frequency process variables from high-frequency HART FSK signals. Channel-level differential measurement reduces common-mode noise, while backplane scheduling distributes scan load across cyclic I/O updates.
Frequently Asked Questions (FAQ)
Q: Can the module process HART and analog signals simultaneously?
A: Yes. The module extracts HART digital communication while maintaining continuous analog signal conversion per channel.
Q: Are all 8 channels galvanically isolated?
A: The module supports differential inputs with channel-level isolation behavior defined by ControlLogix architecture and terminal configuration.
Q: What limits the number of active channels in high-load operation?
A: Backplane current availability and scan cycle timing determine effective channel update rates under full configuration.
Field Installation Guidelines
The module shall be installed in a ControlLogix chassis slot with system power removed prior to insertion of the RTB assembly. All HART-enabled loops must maintain proper 250 Ω minimum loop resistance to ensure signal modulation integrity. Shielded twisted pair cabling is required for differential inputs, with shield termination performed at a single control cabinet ground point. Wiring routes shall be separated from high-frequency switching conductors to prevent induced noise on HART FSK carrier signals. Terminal block seating must be verified before energizing backplane power.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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